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COWLEY, TOWN OF

Wyoming — Community Water System — PWSID: WY5600206

System Information

PWSIDWY5600206
System NameCOWLEY, TOWN OF
System TypeCommunity Water System
Water SourceGround Water
Activity StatusActive
Owner TypeLocal
EPA Region08
Serves SchoolNo
WholesalerYes
First ReportedFeb 13, 1979
Last ReportedNov 17, 2025

Location & Contact

StateWyoming
CityCOWLEY
ZIP Code82420
AddressP.O. BOX 635 (20 South Division Street)
OrganizationBARNES, JOHN W.
Phone307-548-6799

Population & Service

Population Served800
Service Connections375

Drinking Water Violations (29)

This water system has 29 violations recorded in the EPA SDWIS database.

Begin Date End Date Contaminant Category Health-Based Major Measured Federal MCL State MCL Status Return to Compliance Rule
Sep 29, 2025 — E. COLI MR No Yes — — — Unaddressed — Ground Water Rule
Dec 30, 2024 — Lead and Copper Rule MR No No — TT — Resolved Mar 6, 2025 Lead and Copper Rule
Dec 30, 2021 — Lead and Copper Rule MR No No — TT — Resolved Mar 9, 2022 Lead and Copper Rule
Nov 2, 2019 — Groundwater Rule TT Yes No — — — Resolved Dec 10, 2020 Ground Water Rule
Jan 22, 2017 — Groundwater Rule TT Yes No — — — Resolved Dec 10, 2020 Ground Water Rule
Jan 22, 2017 — Groundwater Rule TT Yes No — — — Resolved Dec 10, 2020 Ground Water Rule
Jan 1, 2006 Dec 31, 2006 Nitrate-Nitrite MR No No — — — Resolved Dec 31, 2006 Nitrate Rule
Jan 1, 1999 Dec 31, 1999 1,2-Dichloroethane MR No Yes — 0.005 mg/L — Resolved Dec 31, 1999 Volatile Organic Chemicals
Jan 1, 1999 Dec 31, 1999 Styrene MR No Yes — 0.1 mg/L — Resolved Dec 31, 1999 Volatile Organic Chemicals
Jan 1, 1999 Dec 31, 1999 p-Dichlorobenzene MR No Yes — 0.075 mg/L — Resolved Dec 31, 1999 Volatile Organic Chemicals
Jan 1, 1999 Dec 31, 1999 Xylenes, Total MR No Yes — 10 mg/L — Resolved Dec 31, 1999 Volatile Organic Chemicals
Jan 1, 1999 Dec 31, 1999 1,2-Dichloropropane MR No Yes — 0.005 mg/L — Resolved Dec 31, 1999 Volatile Organic Chemicals
Jan 1, 1999 Dec 31, 1999 Ethylbenzene MR No Yes — 0.7 mg/L — Resolved Dec 31, 1999 Volatile Organic Chemicals
Jan 1, 1999 Dec 31, 1999 Trichloroethylene MR No Yes — 0.005 mg/L — Resolved Dec 31, 1999 Volatile Organic Chemicals
Jan 1, 1999 Dec 31, 1999 1,1,1-Trichloroethane MR No Yes — 0.2 mg/L — Resolved Dec 31, 1999 Volatile Organic Chemicals
Jan 1, 1999 Dec 31, 1999 CHLOROBENZENE MR No Yes — 0.1 mg/L — Resolved Dec 31, 1999 Volatile Organic Chemicals
Jan 1, 1999 Dec 31, 1999 o-Dichlorobenzene MR No Yes — 0.6 mg/L — Resolved Dec 31, 1999 Volatile Organic Chemicals
Jan 1, 1999 Dec 31, 1999 Carbon tetrachloride MR No Yes — 0.005 mg/L — Resolved Dec 31, 1999 Volatile Organic Chemicals
Jan 1, 1999 Dec 31, 1999 trans-1,2-Dichloroethylene MR No Yes — 0.1 mg/L — Resolved Dec 31, 1999 Volatile Organic Chemicals
Jan 1, 1999 Dec 31, 1999 Benzene MR No Yes — 0.005 mg/L — Resolved Dec 31, 1999 Volatile Organic Chemicals
Jan 1, 1999 Dec 31, 1999 DICHLOROMETHANE MR No Yes — 0.005 mg/L — Resolved Dec 31, 1999 Volatile Organic Chemicals
Jan 1, 1999 Dec 31, 1999 1,1-Dichloroethylene MR No Yes — 0.007 mg/L — Resolved Dec 31, 1999 Volatile Organic Chemicals
Jan 1, 1999 Dec 31, 1999 1,1,2-Trichloroethane MR No Yes — 0.005 mg/L — Resolved Dec 31, 1999 Volatile Organic Chemicals
Jan 1, 1999 Dec 31, 1999 1,2,4-Trichlorobenzene MR No Yes — 0.07 mg/L — Resolved Dec 31, 1999 Volatile Organic Chemicals
Jan 1, 1999 Dec 31, 1999 Toluene MR No Yes — 1 mg/L — Resolved Dec 31, 1999 Volatile Organic Chemicals
Jan 1, 1999 Dec 31, 1999 Tetrachloroethylene MR No Yes — 0.005 mg/L — Resolved Dec 31, 1999 Volatile Organic Chemicals
Jan 1, 1999 Dec 31, 1999 cis-1,2-Dichloroethylene MR No Yes — 0.07 mg/L — Resolved Dec 31, 1999 Volatile Organic Chemicals
Jan 1, 1999 Dec 31, 1999 Vinyl chloride MR No Yes — 0.002 mg/L — Resolved Dec 31, 1999 Volatile Organic Chemicals
Jul 1, 1976 Jun 30, 1980 Combined Radium (-226 and -228) MR No No — 5 pCi/L — Archived Jun 30, 1980 Radionuclides and Revised Rad Rule

About This Water System

Public water system data comes from the EPA Safe Drinking Water Information System (SDWIS). Systems with violations must notify customers. Contact your water utility for the latest annual water quality report.

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